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34. Two-way misperfs: Either poor insertion of a sheet into a perforator, or automated perforating that was not yet synchronized to marginal guide markings intended to focus the perforations in the proper location, could result in both horizontal and vertical perforations being off true to varying degrees. Most are relatively minor and average $10 to $15 a stamp.
Type 34: A common type of two-way perforation shift can be seen on this Scott 1009.
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